摘要
航空发动机吞水试验中的雨雾环境依靠喷雾系统来实现,喷雾系统能否精确模拟真实大气雨水环境直接关系着试验的可靠性。采用欧拉-拉格朗日粒子追踪方法,对吞水试验台喷雾系统雾化效果的影响因素进行研究。空气相的变化通过求解时均N-S方程得到,离散液滴的变化通过Fluent中的离散相模型进行模拟,液滴的破碎模拟采用Wave模型,碰撞模拟采用O'Rourke模型,传热传质模型采用等温液滴蒸发模型。结果表明:发动机运行状态、喷嘴孔径和喷水量对雾化效果均有影响,但发动机慢车和最大状态时,三者对雾化效果的影响各有不同。
The rain environment in the test is formed by the spray system. Accurate simulation of real atmo?spheric rain environment is the prerequisite of reliability of the test. Eulerian-Lagrangian particle trackingmethod was adopted to make numerical simulation research of the spray system atomization effect. Airphase field was calculated by solving time-averaged Navier-Stokes formulation. The droplets were solvedby means of discrete phase model in software Fluent. Droplet breakup was simulated by wave model. Drop?let collision was simulated by O’Rourke model. Heat and mass transfer was simulated by isothermal dropletevaporation model. The results show that the operating conditions of aero-engine, the diameter of nozzleand the water jet volume have significant influence on the atomization effect. However, the impact varieswhen engine is in idling or maximum state.
作者
米晓童
邢玉明
MI Xiao-tong;XING Yu-ming(School of Aeronautic Science and Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100191,China)
出处
《燃气涡轮试验与研究》
北大核心
2016年第3期49-54,共6页
Gas Turbine Experiment and Research
基金
航空科学基金(2012024001)
